Backpack stays



FIG. 1 is a perspective view of backpack stays installed within a backpack according to the present invention; and,

FIG. 2 is a plan view of backpack stays installed within a backpack according to the present invention.

The broken line showing in FIGS. 1-2 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for backpack stays, as shown and described. 